Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Foundation/include/Poco/LineEndingConverter.h

@@ -0,0 +1,181 @@
+//
+// LineEndingConverter.h
+//
+// Library: Foundation
+// Package: Streams
+// Module:  LineEndingConverter
+//
+// Definition of the LineEndingConverter class.
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_LineEndingConverter_INCLUDED
+#define Foundation_LineEndingConverter_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/UnbufferedStreamBuf.h"
+#include <istream>
+#include <ostream>
+
+
+namespace Poco {
+
+
+class Foundation_API LineEnding
+	/// This class defines valid line ending sequences
+	/// for InputLineEndingConverter and OutputLineEndingConverter.
+{
+public:
+	static const std::string NEWLINE_DEFAULT;
+	static const std::string NEWLINE_CR;
+	static const std::string NEWLINE_CRLF;
+	static const std::string NEWLINE_LF;
+};
+
+
+class Foundation_API LineEndingConverterStreamBuf: public UnbufferedStreamBuf
+	/// This stream buffer performs line ending conversion
+	/// on text streams. The converter can convert from and to 
+	/// the Unix (LF), Mac (CR) and DOS/Windows/Network (CF-LF) endings.
+	///
+	/// Any newline sequence in the source will be replaced by the
+	/// target newline sequence.
+{
+public:
+	LineEndingConverterStreamBuf(std::istream& istr);
+		/// Creates the LineEndingConverterStreamBuf and connects it
+		/// to the given input stream.
+
+	LineEndingConverterStreamBuf(std::ostream& ostr);
+		/// Creates the LineEndingConverterStreamBuf and connects it
+		/// to the given output stream.
+
+	~LineEndingConverterStreamBuf();
+		/// Destroys the LineEndingConverterStream.
+		
+	void setNewLine(const std::string& newLineCharacters);
+		/// Sets the target line ending for the converter.
+		///
+		/// Possible values are:
+		///   * NEWLINE_DEFAULT (whatever is appropriate for the current platform)
+		///   * NEWLINE_CRLF    (Windows),
+		///   * NEWLINE_LF      (Unix),
+		///   * NEWLINE_CR      (Macintosh)
+		///
+		/// In theory, any character sequence can be used as newline sequence.
+		/// In practice, however, only the above three make sense.
+
+	const std::string& getNewLine() const;
+		/// Returns the line ending currently in use.
+
+protected:
+	int readFromDevice();
+	int writeToDevice(char c);
+
+private:
+	std::istream*               _pIstr;
+	std::ostream*               _pOstr;
+	std::string                 _newLine;
+	std::string::const_iterator _it;
+	char                        _lastChar;
+};
+
+
+class Foundation_API LineEndingConverterIOS: public virtual std::ios
+	/// The base class for InputLineEndingConverter and OutputLineEndingConverter.
+	///
+	/// This class provides common methods and is also needed to ensure 
+	/// the correct initialization order of the stream buffer and base classes.
+{
+public:
+	LineEndingConverterIOS(std::istream& istr);
+		/// Creates the LineEndingConverterIOS and connects it
+		/// to the given input stream.
+
+	LineEndingConverterIOS(std::ostream& ostr);
+		/// Creates the LineEndingConverterIOS and connects it
+		/// to the given output stream.
+
+	~LineEndingConverterIOS();
+		/// Destroys the stream.
+
+	void setNewLine(const std::string& newLineCharacters);
+		/// Sets the target line ending for the converter.
+		///
+		/// Possible values are:
+		///   * NEWLINE_DEFAULT (whatever is appropriate for the current platform)
+		///   * NEWLINE_CRLF    (Windows),
+		///   * NEWLINE_LF      (Unix),
+		///   * NEWLINE_CR      (Macintosh)
+		///
+		/// In theory, any character sequence can be used as newline sequence.
+		/// In practice, however, only the above three make sense.
+		///
+		/// If an empty string is given, all newline characters are removed from
+		/// the stream.
+
+	const std::string& getNewLine() const;
+		/// Returns the line ending currently in use.
+
+	LineEndingConverterStreamBuf* rdbuf();
+		/// Returns a pointer to the underlying streambuf.
+
+protected:
+	LineEndingConverterStreamBuf _buf;
+};
+
+
+class Foundation_API InputLineEndingConverter: public LineEndingConverterIOS, public std::istream
+	/// InputLineEndingConverter performs line ending conversion
+	/// on text input streams. The converter can convert from and to 
+	/// the Unix (LF), Mac (CR) and DOS/Windows/Network (CF-LF) endings.
+	///
+	/// Any newline sequence in the source will be replaced by the
+	/// target newline sequence.
+{
+public:
+	InputLineEndingConverter(std::istream& istr);
+		/// Creates the LineEndingConverterInputStream and connects it
+		/// to the given input stream.
+
+	InputLineEndingConverter(std::istream& istr, const std::string& newLineCharacters);
+		/// Creates the LineEndingConverterInputStream and connects it
+		/// to the given input stream.
+
+	~InputLineEndingConverter();
+		/// Destroys the stream.
+};
+
+
+class Foundation_API OutputLineEndingConverter: public LineEndingConverterIOS, public std::ostream
+	/// OutputLineEndingConverter performs line ending conversion
+	/// on text output streams. The converter can convert from and to 
+	/// the Unix (LF), Mac (CR) and DOS/Windows/Network (CF-LF) endings.
+	///
+	/// Any newline sequence in the source will be replaced by the
+	/// target newline sequence.
+{
+public:
+	OutputLineEndingConverter(std::ostream& ostr);
+		/// Creates the LineEndingConverterOutputStream and connects it
+		/// to the given input stream.
+
+	OutputLineEndingConverter(std::ostream& ostr, const std::string& newLineCharacters);
+		/// Creates the LineEndingConverterOutputStream and connects it
+		/// to the given input stream.
+
+	~OutputLineEndingConverter();
+		/// Destroys the LineEndingConverterOutputStream.
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_LineEndingConverter_INCLUDED